Other, less common melatonin side effects might include abdominal discomfort, mild anxiety, irritability, confusion and short-lasting feelings of depression. In addition, melatonin supplements can interact with various medications, including: Blood-thinning medications (anticoagulants)
The rib cage also contains muscles with an expiratory action. These are the internal intercostal muscles, which slope backward; contraction causes the ribs to move downward and inward, similar to the lowering of a bucket handle.Both internal and external intercostal muscles are also involved in flexing and twisting the trunk.Read more about Breathe Strong, Perform Better.ntercostal muscle contraction also brings about stiffening of the rib cage during lifting, pushing, and pulling movements, which makes the intercostal muscles an important contributor to these movements.
1 These extend from the lateral border of the costal grooves to the superior margins of the ribs below. 2  The fibres of this muscle pass anteroinferiorly in an oblique manner and extend around the thoracic wall from the tubercles to the costal cartilages of the ribs. This part of the muscle is thought to elevate the ribs. 2  Levatores costarum â This muscle originates from the spinous processes of vertebrae C7 to T11 and attaches to the posterior surface and angle of the rib below.